- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Most of the old engines cannot handle the higher running temp associated with unleaded fuel. However there is a fuel additive for sale at most of the filling stations that can be added to the unleaded fuel while refueling, making it suitable for use in older engines. Small amount of two stroke oil can also be added in emergencies.
Drain the fuel out and flush the fuel lines and the filter. Failure to purge the unleaded fuel from the system can destroy the engine due to severe pre ignition.
Weak mixture is main cause ,but what is the psec on this engine as modern fuel is unleaded and if this is a 1990 then it could have been made to only run on leaded petrol ,unleaded engines have a stelite coating on the valve and the seat in the head to run on unleaded fuel ,or the valves have been ground in more than once and the coating has been worn away .Check with the dealer if this model is designed for unleaded fuel ,if it has a cat on it then its designed for unleded fuel
It is best to run this engine on unleaded petrol. A high grade unleaded will give you extra performance and cause no damage. Leaded fuel was designed for cars made in the 60's to 80's that had used softer materials in their cylinder heads, leaded fuel pro-longed cylinder head life and reduced pre-ignition. Unleaded fuels are a cleaner, safer fuel to use.
Unleaded is recommended for this car but it is compatible with LRP since it has no catalytic converter. I am asuming you are in South Africa? Have a look at the NAAMSA fuel compatibility database.
×